1111.sagews

1-x^2-4*x+2=0

var('x')

x

solve(x^2-4*x+2==0,x)

[x == -sqrt(2) + 2, x == sqrt(2) + 2]

2-6*x^2-5*x-6=0

var('x')

x

solve(6*x^2-5*x-6==0,x)

[x == (-2/3), x == (3/2)]

3-9*x^2-6*x+10=0

var('x')

x

solve(9*x^2-6*x+10==0,x)

[x == (-I + 1/3), x == (I + 1/3)]